Bash | Importing a .txt to .txt file, line by line with 'While Read'

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0
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I know this question appears rather frequently, but I cannot seem to find a solution on importing a .txt file line by line to another .txt with the While Read command:

line="input.txt"



while read -r line; do

  printf '%sn' "$line"

done < outputfile.txt

I tried different alternatives, tried them all as variables, using the variables with their directories, tried cat on the input file, use of echo and printf but to no avail. Thanks in advance for any and all advance!

asked Nov 21 at 17:16

Daniel Jameson

Can you explain what’s going wrong - that is, what is happening, and how is that different from what you want to happen? Also, exactly what do you mean by “import”?
– Gordon Davisson
Nov 21 at 17:32

I want it to read the input txt file into the output txt file line by line, though this code runs without errors, nothing gets inputted into the outputfile and it remains blank
– Daniel Jameson
Nov 21 at 17:40

2

you are using outputfile.txt as input in your example, < outputfile.txt means it takes data from that file, not put it in that file, it assigns $line to line it gets from output.txt file, see answer by Mike Q below, you don't need line="input.txt" at all, just put < input.txt instead of outputfile.txt and output the contents of loop to outputfile.txt
– rAlen
Nov 21 at 17:43

1

while read -r line; do printf '%sn' "$line"; done < inputfile.txt > outputfile.txt
– William Pursell
Nov 21 at 17:55

Thank you William as that code has sorted it and thanks to everyone else, you would get votes but I don't think I got that option yet
– Daniel Jameson
Nov 22 at 18:13

add a comment |

up vote
0
down vote

favorite

I know this question appears rather frequently, but I cannot seem to find a solution on importing a .txt file line by line to another .txt with the While Read command:

line="input.txt"



while read -r line; do

  printf '%sn' "$line"

done < outputfile.txt

asked Nov 21 at 17:16

Daniel Jameson

Can you explain what’s going wrong - that is, what is happening, and how is that different from what you want to happen? Also, exactly what do you mean by “import”?
– Gordon Davisson
Nov 21 at 17:32

I want it to read the input txt file into the output txt file line by line, though this code runs without errors, nothing gets inputted into the outputfile and it remains blank
– Daniel Jameson
Nov 21 at 17:40

2

you are using outputfile.txt as input in your example, < outputfile.txt means it takes data from that file, not put it in that file, it assigns $line to line it gets from output.txt file, see answer by Mike Q below, you don't need line="input.txt" at all, just put < input.txt instead of outputfile.txt and output the contents of loop to outputfile.txt
– rAlen
Nov 21 at 17:43

1

while read -r line; do printf '%sn' "$line"; done < inputfile.txt > outputfile.txt
– William Pursell
Nov 21 at 17:55

Thank you William as that code has sorted it and thanks to everyone else, you would get votes but I don't think I got that option yet
– Daniel Jameson
Nov 22 at 18:13

add a comment |

up vote
0
down vote

favorite

I know this question appears rather frequently, but I cannot seem to find a solution on importing a .txt file line by line to another .txt with the While Read command:

line="input.txt"



while read -r line; do

  printf '%sn' "$line"

done < outputfile.txt

asked Nov 21 at 17:16

Daniel Jameson

I know this question appears rather frequently, but I cannot seem to find a solution on importing a .txt file line by line to another .txt with the While Read command:

line="input.txt"



while read -r line; do

  printf '%sn' "$line"

done < outputfile.txt

bash unix while-loop line-by-line

asked Nov 21 at 17:16

Daniel Jameson

asked Nov 21 at 17:16

Daniel Jameson

asked Nov 21 at 17:16

Daniel Jameson

asked Nov 21 at 17:16

Daniel Jameson

asked Nov 21 at 17:16

Daniel Jameson

Can you explain what’s going wrong - that is, what is happening, and how is that different from what you want to happen? Also, exactly what do you mean by “import”?
– Gordon Davisson
Nov 21 at 17:32

I want it to read the input txt file into the output txt file line by line, though this code runs without errors, nothing gets inputted into the outputfile and it remains blank
– Daniel Jameson
Nov 21 at 17:40

2

you are using outputfile.txt as input in your example, < outputfile.txt means it takes data from that file, not put it in that file, it assigns $line to line it gets from output.txt file, see answer by Mike Q below, you don't need line="input.txt" at all, just put < input.txt instead of outputfile.txt and output the contents of loop to outputfile.txt
– rAlen
Nov 21 at 17:43

1

while read -r line; do printf '%sn' "$line"; done < inputfile.txt > outputfile.txt
– William Pursell
Nov 21 at 17:55

Thank you William as that code has sorted it and thanks to everyone else, you would get votes but I don't think I got that option yet
– Daniel Jameson
Nov 22 at 18:13

add a comment |

Can you explain what’s going wrong - that is, what is happening, and how is that different from what you want to happen? Also, exactly what do you mean by “import”?
– Gordon Davisson
Nov 21 at 17:32

I want it to read the input txt file into the output txt file line by line, though this code runs without errors, nothing gets inputted into the outputfile and it remains blank
– Daniel Jameson
Nov 21 at 17:40

2

you are using outputfile.txt as input in your example, < outputfile.txt means it takes data from that file, not put it in that file, it assigns $line to line it gets from output.txt file, see answer by Mike Q below, you don't need line="input.txt" at all, just put < input.txt instead of outputfile.txt and output the contents of loop to outputfile.txt
– rAlen
Nov 21 at 17:43

1

while read -r line; do printf '%sn' "$line"; done < inputfile.txt > outputfile.txt
– William Pursell
Nov 21 at 17:55

Thank you William as that code has sorted it and thanks to everyone else, you would get votes but I don't think I got that option yet
– Daniel Jameson
Nov 22 at 18:13

Can you explain what’s going wrong - that is, what is happening, and how is that different from what you want to happen? Also, exactly what do you mean by “import”?
– Gordon Davisson
Nov 21 at 17:32

I want it to read the input txt file into the output txt file line by line, though this code runs without errors, nothing gets inputted into the outputfile and it remains blank
– Daniel Jameson
Nov 21 at 17:40

you are using outputfile.txt as input in your example, < outputfile.txt means it takes data from that file, not put it in that file, it assigns $line to line it gets from output.txt file, see answer by Mike Q below, you don't need line="input.txt" at all, just put < input.txt instead of outputfile.txt and output the contents of loop to outputfile.txt
– rAlen
Nov 21 at 17:43

while read -r line; do printf '%sn' "$line"; done < inputfile.txt > outputfile.txt
– William Pursell
Nov 21 at 17:55

Thank you William as that code has sorted it and thanks to everyone else, you would get votes but I don't think I got that option yet
– Daniel Jameson
Nov 22 at 18:13

add a comment |

1 Answer
1

active

oldest

votes

up vote
2
down vote

I think you are just trying to combine files ?

cat input.txt >> outputfile.txt

Not suggesting this but as an FYI :

file="input.txt"

while IFS= read -r line ;do

    echo "${line}" >> outputfile.txt 

done < "${file}"

edited Nov 21 at 20:49

answered Nov 21 at 17:26

Mike Q

2,40612237

3

Somehow your code has "smart quotes" in it -- “ where it should be ". Consequently, it won't work if copied-and-pasted. (BTW, speaking of quotes, consider <"$file", with double quotes around the expansion, to avoid bugs with shell versions that don't suppress string-splitting on redirection -- unfortunately, this includes versions of bash still in use today, which can cause surprising "ambiguous redirect" errors).
– Charles Duffy
Nov 21 at 18:13

2

Or, while IFS= read -r line; do echo "$line"; done < input >> output with the output redirection outside the loop.
– glenn jackman
Nov 21 at 19:50

@CharlesDuffy updated, thx~!
– Mike Q
Nov 21 at 20:49

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

up vote
2
down vote

I think you are just trying to combine files ?

cat input.txt >> outputfile.txt

Not suggesting this but as an FYI :

file="input.txt"

while IFS= read -r line ;do

    echo "${line}" >> outputfile.txt 

done < "${file}"

edited Nov 21 at 20:49

answered Nov 21 at 17:26

Mike Q

2,40612237

3

Somehow your code has "smart quotes" in it -- “ where it should be ". Consequently, it won't work if copied-and-pasted. (BTW, speaking of quotes, consider <"$file", with double quotes around the expansion, to avoid bugs with shell versions that don't suppress string-splitting on redirection -- unfortunately, this includes versions of bash still in use today, which can cause surprising "ambiguous redirect" errors).
– Charles Duffy
Nov 21 at 18:13

2

Or, while IFS= read -r line; do echo "$line"; done < input >> output with the output redirection outside the loop.
– glenn jackman
Nov 21 at 19:50

@CharlesDuffy updated, thx~!
– Mike Q
Nov 21 at 20:49

add a comment |

up vote
2
down vote

I think you are just trying to combine files ?

cat input.txt >> outputfile.txt

Not suggesting this but as an FYI :

file="input.txt"

while IFS= read -r line ;do

    echo "${line}" >> outputfile.txt 

done < "${file}"

edited Nov 21 at 20:49

answered Nov 21 at 17:26

Mike Q

2,40612237

3

Somehow your code has "smart quotes" in it -- “ where it should be ". Consequently, it won't work if copied-and-pasted. (BTW, speaking of quotes, consider <"$file", with double quotes around the expansion, to avoid bugs with shell versions that don't suppress string-splitting on redirection -- unfortunately, this includes versions of bash still in use today, which can cause surprising "ambiguous redirect" errors).
– Charles Duffy
Nov 21 at 18:13

2

Or, while IFS= read -r line; do echo "$line"; done < input >> output with the output redirection outside the loop.
– glenn jackman
Nov 21 at 19:50

@CharlesDuffy updated, thx~!
– Mike Q
Nov 21 at 20:49

add a comment |

up vote
2
down vote

I think you are just trying to combine files ?

cat input.txt >> outputfile.txt

Not suggesting this but as an FYI :

file="input.txt"

while IFS= read -r line ;do

    echo "${line}" >> outputfile.txt 

done < "${file}"

edited Nov 21 at 20:49

answered Nov 21 at 17:26

Mike Q

2,40612237

I think you are just trying to combine files ?

cat input.txt >> outputfile.txt

Not suggesting this but as an FYI :

file="input.txt"

while IFS= read -r line ;do

    echo "${line}" >> outputfile.txt 

done < "${file}"

edited Nov 21 at 20:49

answered Nov 21 at 17:26

Mike Q

2,40612237

edited Nov 21 at 20:49

answered Nov 21 at 17:26

Mike Q

2,40612237

answered Nov 21 at 17:26

Mike Q

2,40612237

answered Nov 21 at 17:26

Mike Q

2,40612237

3

Somehow your code has "smart quotes" in it -- “ where it should be ". Consequently, it won't work if copied-and-pasted. (BTW, speaking of quotes, consider <"$file", with double quotes around the expansion, to avoid bugs with shell versions that don't suppress string-splitting on redirection -- unfortunately, this includes versions of bash still in use today, which can cause surprising "ambiguous redirect" errors).
– Charles Duffy
Nov 21 at 18:13

2

Or, while IFS= read -r line; do echo "$line"; done < input >> output with the output redirection outside the loop.
– glenn jackman
Nov 21 at 19:50

@CharlesDuffy updated, thx~!
– Mike Q
Nov 21 at 20:49

add a comment |

3

Somehow your code has "smart quotes" in it -- “ where it should be ". Consequently, it won't work if copied-and-pasted. (BTW, speaking of quotes, consider <"$file", with double quotes around the expansion, to avoid bugs with shell versions that don't suppress string-splitting on redirection -- unfortunately, this includes versions of bash still in use today, which can cause surprising "ambiguous redirect" errors).
– Charles Duffy
Nov 21 at 18:13

2

Or, while IFS= read -r line; do echo "$line"; done < input >> output with the output redirection outside the loop.
– glenn jackman
Nov 21 at 19:50

@CharlesDuffy updated, thx~!
– Mike Q
Nov 21 at 20:49

Somehow your code has "smart quotes" in it -- “ where it should be ". Consequently, it won't work if copied-and-pasted. (BTW, speaking of quotes, consider <"$file", with double quotes around the expansion, to avoid bugs with shell versions that don't suppress string-splitting on redirection -- unfortunately, this includes versions of bash still in use today, which can cause surprising "ambiguous redirect" errors).
– Charles Duffy
Nov 21 at 18:13

Or, while IFS= read -r line; do echo "$line"; done < input >> output with the output redirection outside the loop.
– glenn jackman
Nov 21 at 19:50

@CharlesDuffy updated, thx~!
– Mike Q
Nov 21 at 20:49

add a comment |

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